Sahil Bloom Profile picture
Jul 18, 2021 23 tweets 6 min read Read on X
To outperform, you need serious problem-solving skills.

Fortunately, these skills can be learned.

THREAD: A simple, powerful mental model for thinking clearly and solving complex problems:
When solving problems, the human mind is wired to think in linear, logical, forward terms.

But as the problems get increasingly complex, this forward, logical process often fails.

Enter our simple, powerful mental model: inversion.
What is inversion?

Inversion is a mental model and thinking tool used by some of the world’s greatest thinkers and problem solvers.

Simply put, it says that when problems become challenging to solve forwards, they may be more readily solved backwards.
Inversion as a general thinking tool has been around for millennia.

Stoic philosophers had premeditatio malorum - “the pre-meditation of evils” - an exercise in which they would imagine the worst case scenario ahead of time.

It allowed them to make plans to avoid this outcome. Image
The formal mental model was popularized by German mathematician Carl Jacobi in the mid-1800s.

When faced with difficult problems (which happened frequently in his field of elliptic functions!), he had a strategy: “Man muss immer umkehren.”

Translation: “Invert, always invert.” Image
Jacobi frequently used this strategy when stumped on a challenging math problem.

Rather than continuing to look at it the same way (forwards), he would restate it in inverse form (backwards).

This new, creative perspective often allowed him to solve the problem more easily.
Inversion went mainstream when Charlie Munger made one classic remark:

“All I want to know is where I’m going to die, so I’ll never go there.”

Munger realized that forward, logical thinking can only take you so far.

To solve certain problems, you have to think differently. Image
Inversion is just that: a method for thinking about a problem differently.

It requires you to look at things from a different angle to embrace a new perspective.

Just as the captain surveys the battlefield for a new vector of attack, you too have to uncover a novel approach.
Perhaps more importantly, inversion trains your mind to think dynamically.

Athletes have long known that training in a single plane leads to stasis.

The same principle applies to the mind.

Inversion trains it from multiple angles.

But how/where can you apply it in practice?
Inversion in Investing

Warren Buffett famously stated that there were only two rules of investing:

"Rule #1: Never lose money. Rule #2: Never forget Rule #1."

Buffett and Charlie Munger often evangelize the benefits of simply avoiding stupidity vs. seeking brilliance. Image
Achieving long-term outperformance is extremely challenging.

(Note: If anyone tells you otherwise, you should run in the other direction!)

Applying inversion, rather than solving for how to achieve outperformance, try solving for how to achieve underperformance.
What type of behaviors, thought patterns, and decisions would effectively guarantee you underperform the market?

Said differently, how do you guarantee you break Buffett's Rule #1?

Once you've answered that, you may find it easier to craft a strategy for outperformance.
Inversion in Business

For most startups and businesses, defining and executing against a strategy to drive durable, long-term growth is the primary priority.

But in a high-stakes, competitive market, deciding on the "right" strategy is incredibly difficult.

Inversion can help.
Conduct a pre-mortem analysis (your own "premeditatio malorum") of the different strategies and levers.

For a given strategy, ask a few questions:

If this were to fail, why did it fail?

How might we have avoided this failure?

What are the consequences of this failure?
If you perform this exercise across the various considered strategies for your startup or business, the answer of which strategy to pursue will (likely) come into clear view.

It can be a very helpful exercise for cutting through the noise and making quick, effective decisions.
Inversion in Leadership

There are countless books on how to be an effective leader.

But when you're dropped into a new context and asked to lead, books only take you so far.

A new situation requires a new approach to leadership.

So how do you lead?

Just invert the problem.
Ask yourself a few key questions:

How would I fail to lead?

How would I fail to garner the respect of my team?

If I were a team member, what would really piss me off about this new leader?

Thinking about the problem differently (backwards!) will lead you down the right path.
Inversion in Relationships

Human relationships are arguably the most complex "problem" in nature.

How do you foster a strong, healthy relationship?

Flip this on its head: what would ruin this relationship?

Avoid those behaviors or actions!

It's not perfect, but it's a start.
Inversion is a very simple mental model, yet as these varied examples have shown, it is dynamic, powerful, and useful across a range of situations.

Enjoy this post? Follow me @SahilBloom for more writing on mental models and business.

And remember: Invert, always invert.
I will be turning this thread into a longer-form piece for my newsletter, where I will explore and cover these topics in greater depth.

The piece will be released in the coming days.

Subscribe below so you don’t miss it! sahilbloom.substack.com
And if you are a job seeker looking to leverage inversion and other problem-solving skills to advance your career, check out my curated job board, where I share unique roles at high-growth companies in finance and tech.

New roles added every single week! pallet.xyz/list/thebloomb…
Newsletter piece (+ audio recording for ease of consumption!) on inversion will hit inboxes tomorrow.

Sign up today so you don’t miss it! sahilbloom.substack.com
Invert, Always Invert

The newsletter is now live in your inboxes and ears! Please enjoy, share, and subscribe if you aren’t already! sahilbloom.substack.com/p/invert-alway…

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More from @SahilBloom

Dec 5
I see a lot of bad advice out there when it comes to making money.

Here's my attempt to provide some good...

My honest advice to someone who wants to make a lot of money:
1. The only way to make a lot of money is to create a lot of value.

Here's a harsh truth: No one hands out money. No one is going to pay you just because they like you or think you're cool. That's not the way the world works.

Money earned is a direct byproduct of value created.
The only way to get rich is to create a lot of value for others, and capture a portion of that.

It's not talking about the thing, it's not brainstorming the thing, it's not asking about the thing, it's not thinking about the thing.

The only way is by doing the thing.
Read 31 tweets
Oct 8
The fastest way to improve your life is not adding new things to serve you, but quitting what no longer does.

Here are 9 things I quit to transform my life: Image
I quit focusing on my potential. Image
I quit complaining. Image
Read 11 tweets
Aug 25
I think the whole “alcohol is poison” thing is too black and white.

Social connection is one of the most important factors for your physical health.

If having a beer with your friends promotes that connection, good for you.

If it doesn’t, also good for you.

The point: Do you.
I’ve personally reduced my alcohol consumption about 90-95%, but if I’m with a new or old friend and they want to share a drink of something special, I’m in.
Further, as a society, I think that we should worry less about the couple of beers we drink per month and more about the fact that we stare at phone screens all day, argue on social media with strangers, consume too much sugar, and are far more sedentary than our ancestors.
Read 4 tweets
Jul 26
John Wooden was a treasure trove of wisdom.

My favorite piece of Wooden wisdom: 9 promises for a life well-lived.

These 9 promises create the foundation for happiness and success: Image
1. I promise to talk health, happiness, and prosperity as often as possible.

Your thoughts and language shape your reality. Choose them wisely.
2. I promise to make all my friends know there is something in them that is special and that I value.

It's a shame that we wait until a person's funeral to say all of the nice things we thought about them.

When you think something nice about someone, tell them.
Read 12 tweets
Jul 21
People obsess over the Hamptons but ignore the fact that this is 90 minutes outside NYC in Northwest Connecticut.
Image
Image
Please don’t community note me, the realtor swore this was legit.
Added bonus: You don’t have to sit in 8 hours of traffic on a single lane road to get there.
Read 4 tweets
Jul 17
I'm thrilled to announce that my first book—The 5 Types of Wealth—is officially ​available for preorder​ everywhere books are sold!

I believe this book is going to change millions of lives. Its ideas have already changed mine...

So, what is ​The 5 Types of Wealth​ all about?

It's about rejecting the default and living life by design.

It's about realizing that your wealthy life may involve money, but in the end, it will be defined by everything else.

In this book, I offer a new way for you to think about your life centered around five types of wealth:

• Time Wealth
• Social Wealth
• Mental Wealth
• Physical Wealth
• Financial Wealth

A new way to measure what matters, make better decisions, and design your life around the pillars that truly create lasting joy and fulfillment.

Importantly, this book will not give you the answers. It will give you the right questions, so that you can uncover and act on them.

While the lens through which you view them will be individual, the stories, questions, ideas, and tools contained in this book are universal.

No matter who you are, or where you are on your journey, this book is for you.

If you’ve enjoyed any of my work, you’re going to find immense value in this book. I guarantee it.

My humble ask: Preorders are extremely important for the success of a book—retailers use the data to determine buys, placement, and more—so I'd be truly grateful for your support as I continue on my mission to create millions of positive ripples in the world.

Order today: the5typesofwealth.com

If you reply and share this tweet, I'll personally message you my thanks and a few ideas I think you'll enjoy in the book. No automations, just me, because real impact is personal and human.

P.S. I'm also offering a bunch of bonuses for anyone who preorders one or more copies (a video series, access to a monthly live AMA/office hours, and a virtual book club appearance). Drop your order number in the portal on the website to access those bonuses.Image
I used to make fun of my Dad for buying People Magazine at Hudson News to read on planes.

He just got the last laugh. Image
This is pretty cool. Thanks @grok! Image
Image
Read 8 tweets

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